Vascular bundles with cambium are called

Options

A. Closed
B. Open
C. Exarch
D. Endarch

Answer

To answer the question "Vascular bundles with cambium are called," we need to analyze the types of vascular bundles and their characteristics.

### Step-by-Step Solution:

1. **Understanding Vascular Bundles**: Vascular bundles are arrangements of xylem and phloem in plants. They are crucial for the transport of water, nutrients, and food.

2. **Identifying Types of Vascular Bundles**: There are two main types of vascular bundles based on the presence of cambium:
- **Closed Vascular Bundles**: These contain xylem and phloem but lack cambium. They are typically found in monocots.
- **Open Vascular Bundles**: These contain xylem and phloem separated by a layer of cambium, which is made up of meristematic cells. This type is usually found in dicots.

3. **Analyzing the Options**:
- **Closed Vascular Bundles**: No cambium present. (Incorrect)
- **Open Vascular Bundles**: Cambium is present between xylem and phloem. (Correct)
- **Exerge Condition**: Refers to the arrangement of xylem in roots, not related to cambium. (Incorrect)
- **Enderge Condition**: Also refers to the arrangement of xylem in stems, not related to cambium. (Incorrect)

4. **Conclusion**: Since only the open vascular bundles have cambium present, the answer to the question is that vascular bundles with cambium are called **open vascular bundles**.

### Final Answer:
Vascular bundles with cambium are called **open vascular bundles**.